Oxygen stoichiometry in Co-1212, Co-1222 and Co-1232 of the homologous series Co-12s2 of “category-B” layered copper oxides
نویسندگان
چکیده
منابع مشابه
On category of co-coverings
In this article, we introduce the concept of co-covering which is the dual of covering concept. Then, we prove several theorems being similar to the theorems that have been de-veloped for the covering concept. For example, we provide the lifting criterion for co-coverings of a topological space X, which helps us to classify them by subgroups of the group of all homeomorphisms of X.
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ژورنال
عنوان ژورنال: Physica C: Superconductivity
سال: 2003
ISSN: 0921-4534
DOI: 10.1016/s0921-4534(03)01068-2